package com.wang.interceptor;

import com.wang.listener.Push;
import org.springframework.context.ApplicationEventPublisher;
import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.ModelAndView;

import javax.annotation.Resource;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

/**
 * 登录拦截器
 */
public class LoginInterceptor implements HandlerInterceptor {

    @Resource
    private ApplicationEventPublisher applicationEventPublisher;

    /**
     * 目标方法执行之前
     */
    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        applicationEventPublisher.publishEvent(new Push(this, true));
        return HandlerInterceptor.super.preHandle(request, response, handler);
    }

    /**
     * 目标方法执行之后
     */
    @Override
    public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) throws Exception {
        HandlerInterceptor.super.postHandle(request, response, handler, modelAndView);
    }

    /**
     * 页面渲染之后
     */
    @Override
    public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {
        HandlerInterceptor.super.afterCompletion(request, response, handler, ex);
    }
}
